User's Manual

Last Alarm (0/5)

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Model

30W EKA

- Low Read: AGC stopped because power reading is too low;

- Lock: AGC goal has been reached;

- Max: AGC stopped because of maximum power increasing;

- Min: AGC stopped because of maximum power decreasing;

- Pull-up: AGC is increasing power;

- Pull-down: AGC is decreasing power.

This shows the remote control habilitation. It is possible to choose either

ENABLED or DISABLED position. The TLM Command in the second line

show the actual value of the static on/off command coming from Telemetries

connector on the rear panel. If Remote is DISABLED this command will not

be take in account, if ENABLED this will be the operating state of the MIZAR.

This show the last occurred alarm. The numbers in the first line are the number

of occurred alarm and the maximum alarm number before the lock out of the

MIZAR (five). To reset the lock out press RET and RET again. When an

alarm occurs the menu is automatically changed to this menu.

This menu is available only in protected mode. It is possible to choose the

Model of MIZAR FM Transmitter between 30W and 300W, between EKA,

China and OIRT frequency bands.

Remote DISABLED

TLM Command ON

3.2 AGC IMPLEMENTATION

The AGC goal is to maintain stable the output power. Output power in fact can change due to the increase of

amplifier temperature. Note that when you change the operating frequency the output power change due to

the different gain at different frequency, but this change is not stabilized by this AGC algorithm.

The AGC algorithm is based on the acquisition of the optimal output power level, stored when you change

MIZAR output power. To keep the power stable the AGC change the power gain of MIZAR. When the goal

power is achieved the AGC stops until the power moves up or down.

The AGC work is stopped immediately (output power remains blocked to that reached in the moment of the

AGC stop) when one of this condition occurs:

• one of MIZAR alarms is triggered;

• input power level is to low;

• AGC has change the MIRA output power too much.